Birthstone Rings

							Diamond Education




In the 1950’s the Gemological Institute of America® (GIA®) developed a universal
grading system to objecting compare and evaluate the quality of diamonds. The grading
system is called the 4Cs, which refers to the Carat, Color, Clarity, and Cut of a diamond.

Carat
Carat is the unit of weight for a diamond. Weight is typically measures to the hundred
thousandth of a carat and rounded to a hundredth of a carat. Not to be confused with size,
carat is evaluated by the length, width, and depth of the diamond. This means that two
diamonds can have the same carat weight but have different millimeters sizes and value.
It’s important to note the larger the diamond, the rarer it is. Due to this rarity, a two-carat
stone will cost much more than a one-carat stone of equal quality.

Color
The color grade of the diamond is in reference to how little color is present in the
diamond. An unset diamond is given a grade, ranging from D for colorless to Z for
yellow, by comparing it to stones of a known color in a controlled environment.
Typically, the more “white” or colorless the diamond, the higher the grade. Even the
slightest difference in grade can make a big difference in quality and price. G, H, I, and J
grade diamonds are most common and provide a better value for those who are looking
for near colorless diamonds.

Clarity
Diamonds are formed deep within the earth and under extreme pressure and heat, which
means they often include tiny imperfections called “inclusions” (internal) and
“blemishes” (external). Clarity refers to the size, number, and placement of inclusions
and blemishes. Diamonds with little to no imperfections receive the highest clarity grades
that range from FL, for “flawless,” and I3, for “obvious inclusions.” Due to the rarity of
flawless diamonds, they are the most valuable.

Cut
Cut, commonly confused with the shape of a diamond, refers to the diamond’s
proportions, symmetry, and polish. Because the proportions of a diamond determine the
dispersion of light that is reflected within and off the surface of the stone, the brilliance
and amount of sparkle a diamond has is determined by its cut. The most perfectly
proportioned diamonds have the best light reflection, whereas a shallow cut diamond lack
depth and will not best reflect light.




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